Biết được giới hạn nhiệt độ của vi khuẩn trên gúp ích gì trong thực tiễn?
Biết được giới hạn nhiệt độ của vi khuẩn trên gúp ích gì trong thực tiễn?
Bài 2 : Cho đường tròn (0) Có đường kính AB vuông góc với dây cung MN tại H(H năm giữa O và B). Trên tia MN lấy điểm C nằm ngoài đường tròn (0) sao cho đoạn tháng AC cắt đường tròn (0) tại điểm K khác A, hai dây MN và BK cắt nhau ở E.
a) Chứng minh rằng: Tứ giác AHEK là tứ giác nội tiếp
b) Chứng minh rằng: △ CHACKE, từ đó suy ra CH. KE = AH . CK
c) Chứng minh: MB = NB.
Complete the sentences with the verbs in parentheses. Write if I + the past tense or the -big form of the verb. In some sentences, either response is possible, but the meaning is different.
1. A: It's cold in here. Would you mind (close) the window?
B: Not at all. I'd be glad to.
2. A: It's cold in here. Would you mind (close) the window?
B: Not at all. Go right ahead. I think it's cold in here too.
3. A: You're going to the library? Would you mind (take) this book back to the library for me?
B: Not at all.
4. A: I'm not feeling well at all. Would you mind (go) home now?
B: Oh, I'm sorry. I hope you can come back when you feel better.
5. A: I'm not feeling well at all. Would you mind (leave) if I now before the visiting hours are over?
B: Oh, of course not. We shouldn't stay more than a short time for a hospital visit anyway.
6. A: I'll be working late tonight, honey. Would you mind (cook) dinner tonight? I'll clean up after dinner.
B: I'd be happy to. About what time do you think you'll be home?
7. A: We have a lot of chicken left over from dinner last night. Would you mind (make)
a chicken salad from the leftovers for dinner tonight? B: No, that'll be good. You make a great chicken salad.
8. A: I'm feeling kind of worn out. Chopping wood in the hot sun is hard on me. Would you mind (finish) the work yourself?
B: No problem, Grandpa. Why don't you go in and rest? I'll finish up.
9. A: Would you mind (use) your name as a reference on this job application?
B: Not at all. In fact, ask them to call me.
10. A: I'd like to apply for the job as department manager. Would you mind (recommend) me to the boss?
B: No. As a matter of fact, I was thinking of recommending you myself.